Spread one-fourth of ricotta mixture on each bread slice. Using slotted spoon, divide tomato mixture evenly among bread slices; top with mozzarella.

In single layer on foil-lined toaster oven tray (working in batches if necessary), bake toasts 8 to 10 minutes or until heated through and mozzarella is melted and lightly browned. Garnish with reserved basil.